document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=236655>Question 236655</A>: <I><SPAN STYLE=\"word-break: break-all;\"> how many different 4 digit numbers can be created if no digit can be repeated? Remember a number cannot begin with 0  </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #174149 by </B><A HREF=/tutors/aboutme.mpl?userid=checkley77><B>checkley77(12844)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=checkley77><IMG SRC=http://www.algebra.com/images/aboutme-small.gif BORDER=0 alt=\"About Me\" VALIGN=MIDDLE></A>&nbsp;<IMG SRC=http://www.algebra.com/images/nopicture.jpg><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=174149\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> First digit 1 of 9 (excludes 0 thus 1,2,3,4,5,6,7,8,9 = 9 options.<BR>\n" );
document.write( "Second digit 1 of 9 (includes 0) thus 0 plus 8 of the remaining 9 = 9 options.<BR>\n" );
document.write( "Third digit 1 of 8 total of 10 digits minus the 2 already used = 8 options.<BR>\n" );
document.write( "Fourth digit 1 of 7 total of 10 digits minus the 3 already used = 7 options.<BR>\n" );
document.write( "9*9*8*7=4,536 different numbers. </SPAN>\n" );
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